tools/ubsha1.c

   1 /*
   2  * (C) Copyright 2007
   3  * Heiko Schocher, DENX Software Engineering, <hs@denx.de>
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <unistd.h>
  27 #include <fcntl.h>
  28 #include <errno.h>
  29 #include <string.h>
  30 #include <sys/mman.h>
  31 #include <sys/stat.h>
  32 #include "sha1.h"
  33
  34 #ifndef __ASSEMBLY__
  35 #define __ASSEMBLY__            /* Dirty trick to get only #defines     */
  36 #endif
  37 #include <config.h>
  38 #undef  __ASSEMBLY__
  39
  40 #ifndef O_BINARY                /* should be define'd on __WIN32__ */
  41 #define O_BINARY        0
  42 #endif
  43
  44 #ifndef MAP_FAILED
  45 #define MAP_FAILED (-1)
  46 #endif
  47
  48 extern int errno;
  49
  50 extern void sha1_csum (unsigned char *input, int ilen, unsigned char output[20]);
  51
  52 int main (int argc, char **argv)
  53 {
  54         unsigned char output[20];
  55         int i, len;
  56
  57         char    *imagefile;
  58         char    *cmdname = *argv;
  59         unsigned char   *ptr;
  60         unsigned char   *data;
  61         struct stat sbuf;
  62         unsigned char   *ptroff;
  63         int     ifd;
  64         int     off;
  65
  66         if (argc > 1) {
  67                 imagefile = argv[1];
  68                 ifd = open (imagefile, O_RDWR|O_BINARY);
  69                 if (ifd < 0) {
  70                         fprintf (stderr, "%s: Can't open %s: %s\n",
  71                                 cmdname, imagefile, strerror(errno));
  72                         exit (EXIT_FAILURE);
  73                 }
  74                 if (fstat (ifd, &sbuf) < 0) {
  75                         fprintf (stderr, "%s: Can't stat %s: %s\n",
  76                                 cmdname, imagefile, strerror(errno));
  77                         exit (EXIT_FAILURE);
  78                 }
  79                 len = sbuf.st_size;
  80                 ptr = (unsigned char *)mmap(0, len,
  81                                     PROT_READ, MAP_SHARED, ifd, 0);
  82                 if (ptr == (unsigned char *)MAP_FAILED) {
  83                         fprintf (stderr, "%s: Can't read %s: %s\n",
  84                                 cmdname, imagefile, strerror(errno));
  85                         exit (EXIT_FAILURE);
  86                 }
  87
  88                 /* create a copy, so we can blank out the sha1 sum */
  89                 data = malloc (len);
  90                 memcpy (data, ptr, len);
  91                 off = SHA1_SUM_POS;
  92                 ptroff = &data[len +  off];
  93                 for (i = 0; i < SHA1_SUM_LEN; i++) {
  94                         ptroff[i] = 0;
  95                 }
  96
  97                 sha1_csum ((unsigned char *) data, len, (unsigned char *)output);
  98
  99                 printf ("U-Boot sum:\n");
 100                 for (i = 0; i < 20 ; i++) {
 101                     printf ("%02X ", output[i]);
 102                 }
 103                 printf ("\n");
 104                 /* overwrite the sum in the bin file, with the actual */
 105                 lseek (ifd, SHA1_SUM_POS, SEEK_END);
 106                 if (write (ifd, output, SHA1_SUM_LEN) != SHA1_SUM_LEN) {
 107                         fprintf (stderr, "%s: Can't write %s: %s\n",
 108                                 cmdname, imagefile, strerror(errno));
 109                         exit (EXIT_FAILURE);
 110                 }
 111
 112                 free (data);
 113                 (void) munmap((void *)ptr, len);
 114                 (void) close (ifd);
 115         }
 116
 117         return EXIT_SUCCESS;
 118 }